#!/usr/bin/perl

use strict;
use warnings;

@ARGV == 2 or die "Usage: gcov-gen-html \$ERL_TOP <output directory>\n";

my $srcdir = shift @ARGV;
my $outdir = shift @ARGV;

my $verbose = 1;
my $flavor = "{smp,jit}";

# setup filenames and paths, observe geninfos --base-directory
# it needs a correct path just after the $geninfo

my $lcov_path = ""; #/usr/local/bin/";

my $geninfo      = $lcov_path . "geninfo --no-checksum --base-directory";
my $genhtml      = $lcov_path . "genhtml";

# src paths

my $emu_src_path  = "$srcdir/erts/emulator";
my $elib_src_path = "$srcdir/erts/lib_src";
my $pcre_src_path = "$emu_src_path";
my $zlib_src_path = "$emu_src_path";

# obj paths

my $emu_obj_path  = <$emu_src_path/obj/*-linux-*/gcov/$flavor>;
my $elib_obj_path = <$elib_src_path/obj/*-linux-*/gcov>;
my $pcre_obj_path = <$emu_src_path/pcre/obj/*-linux-*/gcov>;
my $zlib_obj_path = <$emu_src_path/zlib/obj/*-linux-*/gcov>;

# info files

my $emu_info  = "$srcdir/emulator-cover.info";
my $elib_info = "$srcdir/elib-cover.info";
my $pcre_info = "$srcdir/pcre-cover.info";

my $infofiles = "$emu_info $elib_info $pcre_info";

run("$geninfo $emu_src_path  -o $emu_info  $emu_obj_path");
run("$geninfo $elib_src_path -o $elib_info $elib_obj_path");
run("$geninfo $pcre_src_path -o $pcre_info $pcre_obj_path");

if (<$zlib_obj_path/*.o>) {
    my $zlib_info = "$srcdir/zlib-cover.info";
    $infofiles .= " $zlib_info";
    run("$geninfo $zlib_src_path -o $zlib_info $zlib_obj_path");
}

run("$genhtml -o $outdir $infofiles");



sub run {
    my $cmd = shift;
    print STDERR "\nrun($cmd)\n" if $verbose > 0;
    system("$cmd 2>&1") == 0 or die "\nCan't run \"$cmd\": $?";
}
